National Institutes of Health (NIH) · Pricing Plans

Nih Plans Pricing

NIH and NCBI APIs are provided as free public services with no cost to access. All APIs are publicly funded and offered without subscription fees. Access tiers are differentiated primarily by API key registration, which unlocks higher rate limits.

Nih Plans Pricing is the machine-readable pricing-plan profile for National Institutes of Health (NIH) on the APIs.io network, conforming to the API Commons Plans specification.

It defines 5 plans, with named plans including Anonymous / No Key, Registered API Key, Enhanced API Key (High Volume), PubChem Access, NIH RePORTER Access.

Tagged areas include Biomedical, Research, PubMed, Clinical Trials, and PubChem.

5 Plans
View Source
BiomedicalResearchPubMedClinical TrialsPubChemGenomicsHealthScienceGovernment

Plans

Anonymous / No Key

Default access for all NCBI E-utilities without an API key. Suitable for light usage, testing, and exploration.

Registered API Key

Free API key registration unlocks higher rate limits for NCBI E-utilities. Recommended for all production applications and research workflows.

Enhanced API Key (High Volume)

For users requiring more than 10 requests per second. Available on a case-by-case basis by contacting NCBI with documented need.

PubChem Access

PubChem API is free and open with a single usage tier. No API key is required; rate limits are enforced globally.

NIH RePORTER Access

Free public access to NIH research funding data with no registration required. Rate limits enforced per IP address.

Work with this as data

Every plan here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for plans

4 MCP tools reach this
  • find_plansBrowse and filter every plan in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This plan 
curl "https://apis.io/api/v1/plans/nih-plans-pricing"
All plans 
curl "https://apis.io/api/v1/plans?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

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